account
challenge
contact
credit
hacker
links
stat
todo
wtf

Top Hackers
alucardo 354 points 100.00%
saiwa 354 points 100.00%
thefinder 354 points 100.00%
Anonr 350 points 98.87%
neoxquick 344 points 97.18%
tehron 335 points 94.63%
livinskull 330 points 93.22%
Akorlith 325 points 91.81%
madbat2 320 points 90.40%
rubiya 319 points 90.11%

New Hackers
BluntSam : What's that say? III
FwBz : I came, I saw, I encrypted
lvlegab1te : A curious escape
anderss2d : Adjoined
anderson : Selecting the right OS
anders2d : Adjoined

Partner Sites
Halls of Valhalla
Additional Challenge Sites
hax.tor.hu with 50 challenges.
RingZer0 Team Online CTF with 302 challenges.
elhacker.net with 56 challenges.
hacking.allowed.org with 49 challenges.
NOE.systems with 19 challenges.
Updated on 09/20/19 2:54:35 PM UTC
It's only a game!

Research harder

sn0dgrass Score : 14 points 03.95% complete
Jump to charts

Challenge Difficulty Date
What's that say? II 		Just plain silly (1) 09/29/2014  09:19:30 PM
Adjoined 		Pretty dang easy (3) 09/29/2014  10:10:00 PM
Digging Deeper 		Moderate (5) 09/29/2014  10:13:23 PM
Reversing the application I 		Moderate (5) 09/29/2014  10:30:48 PM
 
Score : 14 points 03.95% complete



Jump to top
Pseudo
  Pass

There are currently 90 challenges, with a maximum possible value of 354 points.

New Challenges
Rumplestiltskin
Unusual Translation
Hashed II
Beep Beep
JSON and the Argonauts III
JSON and the Argonauts II
JSON and the Argonauts I

Most Popular Challenges
What's that say? I
A curious escape
Computer Talk
Base 8^2
What's that say? III
I came, I saw, I encrypted
What goes there?

Member of The Internet Defense League

Care and feeding instructions